There needs to be a "melodious train announcer's fan club" for such things.

Excellent idea; I'd join!

And thanks for a lovely and enjoyable post.

Thank you! I'm glad you liked it. It really did all come about from that sentence-and-a-half in your entry; that's what I started with, then I thought I'd just add a little preamble, and then I ended up with all that rambling nonsense you see before you. :-) With your sentence tucked in at the very end.